Acwa Power International, the Saudi power developer is among parties that have expressed interest in 1Malaysia Development Berhad's energy assets, people with knowledge of the matter said. The companies have indicated they may bid for power plants owned by the state investment fund if they become available, the people said, asking not to be named as the information is private. A spokesman for 1MDB declined to comment, while a representative for Acwa didn't immediately respond to requests for comment outside regular business hours in Saudi Arabia.